According to data from relevant research institutions, the cumulative penetration rate of household light storage integration
in the United States, Germany, Japan and Australia in 2020 is 7.6%, 20.8%,17.2% and 3.8%, respectively, and the penetration
rate is expected to increase to 18.8%, 46.6%,38.5% and 8.4% by 2025.
Why is distributed PV storage so important globally? How does it work and what is its function? RANKTOP helps you read PV.
Today, let's talk about "distributed photovoltaic + energy storage" those things!
01 What is distributed photovoltaic storage
As we all know, photovoltaic power generation is the process of converting solar energy into electrical energy, its output power
"depends on the day to eat", susceptible to solar radiation intensity, temperature and other environmental factors, with volatility,
intermittency, instability and other characteristics. On the other hand, as the scale of grid-connected photovoltaic installations
continues to grow, the demand for flexible and adjustable resources on the grid is becoming more and more urgent. For example,
during peak hours, the grid is often overloaded; Or when the power grid has a large area of power outage, the user is in the dilemma
of "no electricity available". Therefore, these pain points are undoubtedly a great challenge for distributed PV for self-use.
This is where energy storage comes in. The energy storage system is similar to the super-large "charging treasure", which can store
the electric energy and release it when the user needs it, ensure the stability of household electricity, and cut the peak and fill the
valley to alleviate the power grid pressure.
02 How does the energy storage system work
We mentioned the working principle of the inverter - converting the direct current generated by the photovoltaic array into alternating
current. Just as the inverter is the heart of photovoltaic, the energy storage inverter is also the core device of the energy storage system.
According to system differences, energy storage inverters are divided into hybrid inverters, AC coupled energy storage inverters, off-grid
energy storage inverters (RANKTOP more energy storage knowledge points, please look forward to subsequent updates), etc., among them,
with high integration, powerful and other advantages, hybrid inverters have become popular in the hearts of users.
Let's take Ranktop optical storage hybrid inverter as an example:
Under the sun, the hybrid inverter converts the obtained DC into alternating current for household use, the remaining power is preferentially
converted into DC and stored in the battery, and the remaining DC is sent to the grid for income.
In the case of short-time power outages caused by thunderstorms and other conditions, the photovoltaic system cannot generate electricity,
and the stored energy can be used in case of power failure in the grid.
At night or in rainy days, the power stored in the battery can be converted into alternating current for home use; During peak hours, the grid
works with batteries to power homes; In the early hours of the morning, the grid can charge the battery.
In the case of long-term power failure caused by bad weather such as snow, when the photovoltaic system, the grid and the energy storage
battery are unable to supply power, the diesel generator can work, and the optical storage hybrid inverter and the generator complement each
other to avoid long-term power failure.
03 What is the role of distributed photovoltaic storage
The energy storage system is equivalent to the "power manager", which can choose the most cost-effective and most stable way of electricity
consumption.
For users, distributed photovoltaic storage improves the self-use rate, and users can not only charge while using electricity, but also convert
excess solar energy into electricity and store it for emergencies. What's more, it can "cut peaks and fill valleys" to avoid users using electricity
at peak times. This also means that we can use electricity from the grid when electricity is cheapest, which will save energy and money!
When energy storage is not configured, most families can also use the usual stored energy even if the power grid is cut off. It is mainly based
on traditional power, and it is more dependent on the power grid. After distributed photovoltaic storage, users can decide their own electricity
consumption.
For the public grid, if more and more distributed photovoltaics are configured with energy storage systems, the power supply pressure is greatly
reduced. Moreover, if a system in the grid suddenly fails, it will not cause a large area of power outage, after all, at this time the energy storage
system will "mobilize" the energy in the battery for users to use.
04 Ranktop summary
Back to the original question, why is distributed photovoltaic storage so important on a global scale, do you get it? However, before installing an
energy storage system, we need to understand its performance and solutions in detail, and choose the right product according to our needs. It is
hoped that through the introduction of this article by Ranktop Xiaobian, everyone will have a further understanding of distributed photovoltaic storage.
Ranktop helps you read PV. If you have questions about distributed photovoltaic, you can leave a message for consultation, we will have professional
and technical personnel to answer questions.